The invention discloses a wireless transmission-based intelligent overload relay control system. The system comprises a signal collection unit, a signal transmission unit and a signal processing unit, wherein the signal collection unit is used for collecting an operating state signal of a bus tie switch; the signal transmission unit is used for receiving the operating state signal, collected by the signal collection unit, of the bus tie switch, and transmitting the signal to the signal processing unit; and the signal processing unit performs processing and analyzing on the received signal, and performs intelligent switching on a parallel state and a separated state of load relays according to the analysis result. According to the system provided by the invention, through the synergistic effect of the signal collection unit, the signal transmission unit and the signal processing unit, the output signal of the bus tie switch can be automatically collected in real time; and the parallel state and the separated state of the load relays are intelligently switched according to the output signal of the bus tie switch, so that the working efficiency is improved, and the switching can be performed in time.